Aquatic Invasive Species (AIS) and fish parasites or diseases are readily transferred from one water body to another on diving gear, boats and protective clothing. These can be very damaging to resident fish stocks, the aquatic habitat and the general environment. In order to ensure that invasive species and fish diseases are not inadvertently transferred into Ireland’s freshwaters from abroad or within the country from an infested area to one that is free from these organisms, it is essential that all scuba diving equipment is routinely inspected and disinfected following each diving trip with reference to the guidelines below.